The REX 2 uses ROTOR’s ultra-rigid and UBB30 technology (developed for the 3D+), offering a performance upgrade opportunity for almost all bikes on the market – whether they were designed for 30mm cranks or not.

Cold forged, trinity drilled

The REX’s cold forged, trinity drilled arms and aluminum UBB30 axle ensures serious rigidity and performance to face anything you can throw at it, while saving weight in regards to the majority of 24mm cranksets.

UBB30 AXLE

The REX 2’s axle technology comes from our UBB concept, which is compatible with most bottom bracket standards on the market. This allows for surprising and unexpected new options for upgrading bikes of any BB type: our groundbreaking UBB30 axle concept is compatible with BSA (68 & 73), ITA, BB86, BBB89, BB92, BB30, & BB386 evo.

The UBB (Universal Bottom Brackets) concept is simple: it fits everything. UBB is a design concept that Rotor applies to all its cranksets to make them compatible with all BB standards and frames on the market. It allows installation of almost any crank with a 30 or 24mm axle from ROTOR on the bike you have, regardless of its BB type.